Chair frame



FIG. 1 is a top perspective view of a chair frame showing my new design;

FIG. 2 a front view thereof;

FIG. 3 is a left side view thereof, the opposite side view being a mirror image thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is top perspective view thereof showing an alternative seat and back arrangement.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a “chair frame,” as shown and described. 